Sodium metaborate7775-19-1100 % similar Sodium metaborate tetrahydrate10555-76-780 % similar Lithium metaborate13453-69-560 % similar Barium borate13701-59-260 % similar Calcium metaborate13701-64-960 % similar Lead metaborate (Pb(BO2)2)14720-53-760 % similar